james w



(No Model.)

J W. JACKSON.

ROLL FOR ROLLER MILLS.

Patented Sept, 15, 1885. r

INVENT'OR 'i ll VBY WITNESSES:

ATTORNEY UNITED STATES PATENT ()FFICE.

JAMES W. JACKSON, OF DENVER, COLORADO.

ROLL FOR ROLLER-MILLS.

SPECIFICATION forming part of Letters Patent No. 326,121, datedSeptember 15, 1885.

' Application filed March 16, 1895.

To aZZ whom it may concern.-

Be it known that I, JAMES W. JACKSON, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in Rolls forRoller-Mills, of

which the following is a specification, refer ence being had to theaccompanying drawings.

This invention relates to animprovement in means for attaching the outerportion or shell of a crushing-roll to the axis upon which it isrotated, and more particularly to that species of roll used. in reducingore, which, being composed of exceedingly hard material, it is desirableto provide with means for detachably securing the same to itsdriving-shaft, and also for adjusting the same to an operative position,without the use of machine-tools. By means of the devices hereinafterdescribed the hard portion or shell of my improved roll is rend'eredconcentrically adjustable, and at the same time capable of being readilyremoved and replaced, as will be hereinafter fully set forth andclaimed.

In the accompanying drawings, Figure 1 is an elevation, partly insection, showing the hub, the shell, and. the adjusting devices. Fig. 2is an end elevation, partly in section, of a roll embodying myinvention. Figs. 8 and 4 are detail views of the shell or outer portionof the roll. Figs. 5 and 8 are detail views of the inner portion or hubupon which the shell is supported. Figs. v6 and 7 are detail views ofthe adjusting or key blocks.

The same letters denote the same parts.

S represents the shaft upon which the roll is to be mounted. B is a hub,which is permanently secured to said shaft, and preferably composed ofordinary iron or other malleable metal, and it is provided at one endwith a flange or collar, Z). At regular intervals around said hub Bportions of its periphery are removed, formingwedge-shaped key seats orrecesses d, the metal on the opposite sides of which being cut away andtapered to form the wings D, between the extremities of which and therear ends of the recesses are openings adapted to receive the key to besecured therein. In this particular instance I have shown thehubprovided with three such recesses,-

(No model.)

A is the outer shell-of the roller, and consti-- tutes that portionwhich comes into contact with the substances to be reduced, and in orderto withstand the rough usage to which it is subjected it must be of thehardest metal ob t-ainable, and as such materials are not readllymanipulated or worked it is desirable to replace a worn-out or defectiveshell without going to the expense and trouble of permanently securingit by any of the well-known means. I therefore make the. said shellsomewhat larger than the diameter of the flange b, and provide it withinwardly-extendingwedgeshaped keys F, of a length corresponding to theside openings of the recesses d.

In assembling my device the hub is first permanently secured upon itsshaft. The shell A is then placed upon the hub, the keys F entering therear ends of the key-seats d. The shell being larger than the hub, thespace between them, O, permits adjustment, and the shell is turned untilthe keys rest solidly against the flange b, when an adjusting-block, E,is inserted behind each key. These blocks are shorter than the width ofthe wings and recesses, and are longitudinally perforated at a, andprovided with adj usting-bolts e, which pass through said blocks and theflange b, and

by means of which the wedges can be adjusted as desired.'

I do not consider it desirable to adjust the shell wholly by means ofthe wedge-blocks E, as could readily be done by such slight and obviousmodification of their lines as would give them vertical as well aslateral action,

because the pressure against the under side of 0 the shell by saidwedges would be unequal,

and therefore dangerous to such hard and brit- IOC its of the space 0,so as to compensate for any single piece and provided internally withcirslight irregularities in thickness or form, and l cumferential keysreglsteringwlth the recesses so bring its periphery into a positionconcentric with the axis. When the shell has been adjusted as abovedescribed, the space 0 is to be filled with metal borings or any hardcement, and the wedges E tightened, after which the roll is ready foruse.

I am aware that it is not new to provide crushing-rollswith chilled orotherwise hardened rims, the same being applied and attached insections, and therefore do not claim a detachable rim, broadly, as myinvention consists in means for detachably connecting a solid chilledrim to its supporting-hub.

NVhat I claim, and desire to secure by Letters Patent, is-

v 1. A roll consisting of a hub permanently secured to the axle andformed with circumferential recesses in its periphery, said recessesbeing provided with transverse openings therein, and an outer portion orshell formed in a in the hub, and adjusting-blocks fitting thetransverse openings in the recesses in the hub, substantially as setforth.

2. The combination of the hub 13, having depressions d, and side wings,D, with the shell A, formed with the Wedge-shaped keys F, adapted toenter the said recesses d, and the wedge-shaped blocks E, and means,substantially as described, for adjusting said blocks.

3. The combination, with the recessed hub B, of the shell A, formed withkeys registering with the recesses in the hub, the adjustingscrews P,and blocks for insertion behind the keys F, substantially as described.

In testimony whereof I affix my signature in the presence of twowitnesses.

JAMES W. JACKSON.

\Vitnesses:

B. R. GRAYSON, L. L. SAWYER.

